Home / 3,173.85-4,379.11-1,915.65

Finding the Fourth Proportional to 3,173.85, 4,379.11 and 1,915.65

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Solution

The fourth proportional to 3,173.85, 4,379.11 and 1,915.65 is: 2,643.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,173.85 : 4,379.11 = 1,915.65 : x
  2. Step 2: Convert to fraction form
    3,173.85/4,379.11 = 1,915.65/x
  3. Step 3: Cross multiply
    3,173.85x = 4,379.11 × 1,915.65
  4. Step 4: Simplify right side
    3,173.85x = 8,388,837.28
  5. Step 5: Solve for x
    x = 8,388,837.28/3,173.85
  6. Step 6: Final answer
    x = 2,643.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.